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	<title> 输入框组的大小</title>
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    <h1> 输入框组的大小</h1>
    <pre>
      1. div.form-group
      2. div.input-group.input-group-lg.input-group-sm.input-group-xs
      3. span.input-group-addon
    </pre>
    <form class="form-horizontal" role="form" action="">
      <div class="form-group">
        <label class="control-label col-md-3 sr-only" for="">Sina</label>
        <div class="col-md-6">
          <div class="input-group input-group-lg">
            <span class="input-group-addon">@</span>
            <input class="form-control" type="text">
          </div>
        </div>
      </div>
      <div class="form-group">
        <label class="control-label col-md-3 sr-only" for="">Sina</label>
        <div class="col-md-6">
          <div class="input-group">
            <span class="input-group-addon">@</span>
            <input class="form-control" type="text">
          </div>
        </div>
      </div>
      <div class="form-group">
        <label class="control-label col-md-3 sr-only" for="">Sina</label>
        <div class="col-md-6">
          <div class="input-group input-group-sm">
            <span class="input-group-addon">@</span>
            <input class="form-control" type="text">
          </div>
        </div>
      </div>            
      <div class="form-group">
        <label class="control-label col-md-3 sr-only" for="">vip</label>
        <div class="col-md-6">
          <div class="input-group input-group-lg">
            <span class="input-group-addon">$</span>
            <input class="form-control" type="number">
            <span class="input-group-addon">.00</span>
          </div>
        </div>
      </div>
      <div class="form-group">
        <label class="control-label col-md-3 sr-only" for="">vip</label>
        <div class="col-md-6">
          <div class="input-group">
            <span class="input-group-addon">$</span>
            <input class="form-control" type="number">
            <span class="input-group-addon">.00</span>
          </div>
        </div>
      </div>
      <div class="form-group">
        <label class="control-label col-md-3 sr-only" for="">vip</label>
        <div class="col-md-6">
          <div class="input-group input-group-sm">
            <span class="input-group-addon">$</span>
            <input class="form-control" type="number">
            <span class="input-group-addon">.00</span>
          </div>
        </div>
      </div>            
    </form>
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